package com.offcn.oss;

import com.aliyun.oss.OSS;
import com.aliyun.oss.OSSClientBuilder;
import com.aliyun.oss.common.utils.BinaryUtil;
import com.aliyun.oss.model.MatchMode;
import com.aliyun.oss.model.PolicyConditions;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

import java.io.UnsupportedEncodingException;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.LinkedHashMap;
import java.util.Map;

@RestController
@RequestMapping("/thirdparty/v1/admin/oss")
public class OSSController {
    @Value("${spring.cloud.alicloud.access-key}")
    private String accessid;

    @Value("${spring.cloud.alicloud.secret-key}")
    private String accessSecret;

    @Value("${spring.cloud.alicloud.oss.endpoint}")
    private String endpoint;

    @Value("${spring.cloud.alicloud.oss.bucket}")
    private String bucket;
    @RequestMapping("/getPolicy")
    public Map<String,String> getPolicy(){
        SimpleDateFormat simpleDateFormat = new SimpleDateFormat("yyyy-MM-dd");
        String dir = simpleDateFormat.format(new Date())+"/";

//        String accessId = accessid; // 请填写您的AccessKeyId。
        String accessKey = accessSecret; // 请填写您的AccessKeySecret。
//        String endpoInt = endpoint; // 请填写您的 endpoint。
//        String bucKet = bucket; // 请填写您的 bucketname 。
        String host = "https://" + bucket + "." + endpoint; // host的格式为 bucketname.endpoint
        // callbackUrl为上传回调服务器的URL，请将下面的IP和Port配置为您自己的真实信息。
        // String callbackUrl = "http://88.88.88.88:8888";
        // String dir = "user-dir-prefix/"; // 用户上传文件时指定的前缀。

        // 创建OSSClient实例。
        OSS ossClient = new OSSClientBuilder().build(endpoint, accessid, accessKey);

        try {
            long expireTime = 30;
            long expireEndTime = System.currentTimeMillis() + expireTime * 1000;
            Date expiration = new Date(expireEndTime);
            // PostObject请求最大可支持的文件大小为5 GB，即CONTENT_LENGTH_RANGE为5*1024*1024*1024。
            PolicyConditions policyConds = new PolicyConditions();
            policyConds.addConditionItem(PolicyConditions.COND_CONTENT_LENGTH_RANGE, 0, 1048576000);
            policyConds.addConditionItem(MatchMode.StartWith, PolicyConditions.COND_KEY, dir);

            String postPolicy = ossClient.generatePostPolicy(expiration, policyConds);
            byte[] binaryData = postPolicy.getBytes("utf-8");
            String encodedPolicy = BinaryUtil.toBase64String(binaryData);
            String postSignature = ossClient.calculatePostSignature(postPolicy);

            Map<String, String> respMap = new LinkedHashMap<String, String>();
            respMap.put("accessid", accessid);
            respMap.put("policy", encodedPolicy);
            respMap.put("signature", postSignature);
            respMap.put("dir", dir);
            respMap.put("host", host);
            respMap.put("expire", String.valueOf(expireEndTime / 1000));
            // respMap.put("expire", formatISO8601Date(expiration));
            return respMap;
        } catch (UnsupportedEncodingException e) {
            e.printStackTrace();
            return null;
        }
    }
}
